/*
 * Copyright (c) 2007, 2015, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */
/*
 * Copyright 2003-2004 The Apache Software Foundation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */


package com.sun.org.apache.xerces.internal.impl.xs.models;

import com.sun.org.apache.xerces.internal.impl.Constants;
import com.sun.org.apache.xerces.internal.impl.XMLErrorReporter;
import com.sun.org.apache.xerces.internal.impl.dtd.models.CMNode;
import com.sun.org.apache.xerces.internal.impl.xs.XSMessageFormatter;
import com.sun.org.apache.xerces.internal.utils.XMLSecurityManager;
import com.sun.org.apache.xerces.internal.xni.parser.XMLComponentManager;
import com.sun.org.apache.xerces.internal.xni.parser.XMLConfigurationException;

/**
 * @author Neeraj Bajaj
 * @version $Id: CMNodeFactory.java,v 1.7 2010-11-01 04:39:58 joehw Exp $
 * @xerces.internal
 */
public class CMNodeFactory {


  /**
   * Property identifier: error reporter.
   */
  private static final String ERROR_REPORTER =
      Constants.XERCES_PROPERTY_PREFIX + Constants.ERROR_REPORTER_PROPERTY;

  /**
   * property identifier: security manager.
   */
  private static final String SECURITY_MANAGER =
      Constants.XERCES_PROPERTY_PREFIX + Constants.SECURITY_MANAGER_PROPERTY;

  private static final boolean DEBUG = false;

  //
  private static final int MULTIPLICITY = 1;

  //count of number of nodes created
  private int nodeCount = 0;

  //No. of nodes allowed.
  private int maxNodeLimit;


  /**
   * Error reporter. This property identifier is:
   * http://apache.org/xml/properties/internal/error-reporter
   */
  private XMLErrorReporter fErrorReporter;

  // stores defaults for different security holes (maxOccurLimit in current context) if it has
  // been set on the configuration.
  private XMLSecurityManager fSecurityManager = null;

  /**
   * default constructor
   */
  public CMNodeFactory() {
  }

  public void reset(XMLComponentManager componentManager) {
    fErrorReporter = (XMLErrorReporter) componentManager.getProperty(ERROR_REPORTER);
    try {
      fSecurityManager = (XMLSecurityManager) componentManager.getProperty(SECURITY_MANAGER);
      //we are setting the limit of number of nodes to 3times the maxOccur value..
      if (fSecurityManager != null) {
        maxNodeLimit =
            fSecurityManager.getLimit(XMLSecurityManager.Limit.MAX_OCCUR_NODE_LIMIT) * MULTIPLICITY;
      }
    } catch (XMLConfigurationException e) {
      fSecurityManager = null;
    }

  }//reset()

  public CMNode getCMLeafNode(int type, Object leaf, int id, int position) {
    return new XSCMLeaf(type, leaf, id, position);
  }

  public CMNode getCMRepeatingLeafNode(int type, Object leaf,
      int minOccurs, int maxOccurs, int id, int position) {
    nodeCountCheck();
    return new XSCMRepeatingLeaf(type, leaf, minOccurs, maxOccurs, id, position);
  }

  public CMNode getCMUniOpNode(int type, CMNode childNode) {
    nodeCountCheck();
    return new XSCMUniOp(type, childNode);
  }

  public CMNode getCMBinOpNode(int type, CMNode leftNode, CMNode rightNode) {
    return new XSCMBinOp(type, leftNode, rightNode);
  }

  public void nodeCountCheck() {
    if (fSecurityManager != null && !fSecurityManager.isNoLimit(maxNodeLimit) &&
        nodeCount++ > maxNodeLimit) {
      if (DEBUG) {
        System.out.println("nodeCount = " + nodeCount);
        System.out.println("nodeLimit = " + maxNodeLimit);
      }
      fErrorReporter.reportError(XSMessageFormatter.SCHEMA_DOMAIN, "maxOccurLimit",
          new Object[]{new Integer(maxNodeLimit)}, XMLErrorReporter.SEVERITY_FATAL_ERROR);
      // similarly to entity manager behaviour, take into accont
      // behaviour if continue-after-fatal-error is set.
      nodeCount = 0;
    }

  }//nodeCountCheck()

  //reset the node count
  public void resetNodeCount() {
    nodeCount = 0;
  }

  /**
   * Sets the value of a property. This method is called by the component
   * manager any time after reset when a property changes value.
   * <p>
   * <strong>Note:</strong> Components should silently ignore properties
   * that do not affect the operation of the component.
   *
   * @param propertyId The property identifier.
   * @param value The value of the property.
   * @throws SAXNotRecognizedException The component should not throw this exception.
   * @throws SAXNotSupportedException The component should not throw this exception.
   */
  public void setProperty(String propertyId, Object value)
      throws XMLConfigurationException {

    // Xerces properties
    if (propertyId.startsWith(Constants.XERCES_PROPERTY_PREFIX)) {
      final int suffixLength = propertyId.length() - Constants.XERCES_PROPERTY_PREFIX.length();

      if (suffixLength == Constants.SECURITY_MANAGER_PROPERTY.length() &&
          propertyId.endsWith(Constants.SECURITY_MANAGER_PROPERTY)) {
        fSecurityManager = (XMLSecurityManager) value;
        maxNodeLimit = (fSecurityManager != null) ?
            fSecurityManager.getLimit(XMLSecurityManager.Limit.MAX_OCCUR_NODE_LIMIT) * MULTIPLICITY
            : 0;
        return;
      }
      if (suffixLength == Constants.ERROR_REPORTER_PROPERTY.length() &&
          propertyId.endsWith(Constants.ERROR_REPORTER_PROPERTY)) {
        fErrorReporter = (XMLErrorReporter) value;
        return;
      }
    }

  } // setProperty(String,Object)

}//CMNodeFactory()
